A company Chef Information Officer (CIO) who wants to ensure..

A company Chef Information Officer (CIO) who wants to ensure rapid elasticity for the company’s cloud solution would MOST likely choose which of the following types of cloud?
A. Public cloud
B. Private community cloud
C. Private cloud
D. Community cloud

Answer: CExplanation:
Rapid elasticity is a cloud computing term for scalable provisioning, or the ability to provide scalable services. Software that can scale in a private cloud faces two security related issues: Although the private cloud infrastructure can enable rapid elasticity in the supply of virtual resources, hosted applications and services must be designed correctly if they are to function securely when they are scaled out. Hosted applications and services that initiate scaling requests automatically based on monitored demand or a timetable must perform these operations without impacting their own or other services availability within the cloud.
http://social.technet.microsoft.com/wiki/contents/articles/6810.private-cloud-security-challengesrapid-elasticity.aspx